Beckett Robert Lee was born Tuesday in London, People.com reported. Beckett is the grandchild of rock and roll icon Paul McCartney.
Stella McCartney and Willis, who is chairman of a furniture company, also have a nearly 3-year-old son Miller Alasdhair James and 1-year-old daughter Bailey Linda Olwyn.
Wisconsin business offering 'therapeutic cuddling' forced to close
Reindeer recovered after escaping from Santa during lighting ceremony